Rotary gas-engine.



C. W. MITCHELL.

ROTARY GAS ENGINE.

APPLlCATiON FILED MAY 5. 1909.

1 165 988, Patented Dec. 28, 1915.

6 SHEETSSHEET 1.

WITNESSES mvzmna Charles Ml/M'z'taizell.

ATTORNEY G. W. MITCHELL.

ROTARY GAS ENGINE.

APPLICATION FILED MAY 5, 1909.

Patented Dec. 28, 1915.

6 SHEETSSHEET 2.

ATTORNEY C. W. MITCHELL.

ROTARY GAS ENGINE.

APPLICATION man mus. 1909.

Patented Dec. 28 1915.

6 SHEETSSHEET 3.

R INVENTUB Lharles W. Mt tch ell ATTURNEY C. W. MITCHELL.

ROTARY GAS ENGINE".

APPLICATION FILED MAY 5, 1909.

ATTORNEY C. W. MITCHELL.

ROTARY GAS ENGINE.

APPLICATION FILED MAY 5, 1909.

1,165,988, Patented Dec. 28, M5.

6SHEETSSHEET 5.

INVENTUR Charles W Mitchell ATIORNEV C. W. MITCHELL.

ROTARY GAS ENGINE.

APPLICATION men MAY 5, 1909.

INVENTUR Charles W. Mitchell ATIUBNEY ll %TATE% PATENT @FFIEGE.

CHARLES W. MITCHELL, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-TI-IIRD TO LIZZIE A. MITCHELL AND ONE-THIRD TO ALEXANDER W. MORROW, 0F

PHILADELPHIA, PENNSYLVANIA.

ROTARY GAS-ENGINE.

Application filed May 5, 1909.

T 0 all whom it may concern:

Be it known that I, CHARLEs W. MITCH- ELL, a citizen of the UnitedStates, residing in Philadelphia, in the county of Philadelphia andState of Pennsylvania, have in-- vented certain new and usefulImprovements in Rotary Gas-Engines, of which the following is aspecification.

My invention relates to engines wherein power is developed by a gaswhich is caused to explode in a chamber of a stationary box to produceimpulses on a piston wheel or rotor, to cause a continuous rotation ofthe rotor, and the object thereof is, first to produce a rotary pistonfor a fluid engine, secondto cause a piston to rotate by impulsesproduced by a series of explosions, thirda stationary explosion chamber,fourtha shoe for producing gas-tight contact between the chamber and thepiston, fifthto cause the exploded gas to produce the greatest possibleeffect on the piston, sixth-to cause the exploded gas to preventleakage, seventh-to discharge the exploded mixture after its impulsiveeffect is spent, eighthto govern the explosions for the purpose ofproducing a uniform speed, ninthto vary the supply of the explodingmixture with the variation of the speed, tentht0 produce a constantspeed under a variable load, eleventhto produce a self-starting engine,and twelfth-t0 produce a reversible engine.

With these and other objects in view, this invention'consists in thecombination, construction, and the arrangement of parts as will behereinafter more fully described and claimed, and illustrated in theaccompanying drawings, it being understood that changes in form, size,shape, and minor details may be within the scope of the claims, withoutdeparting from the spirit or sacrificing any of theadvantages of thisinvention.

In the accompanying drawings, Figure 1, is a front elevation partly inperspective; .Fig. 2, is a side elevation thereof; Fig. 3, is a detailin connection with a starting device shown in Fig. 2; Fig. 4, is amodification thereof; Fig. 5, is an obverse side elevation showing thenecessary attachments for making the engine reversible; Fig. 6, is

. a cross section of a non-reversible engine;

Fig. 7, is a cross section of a reversible en- Specification of LettersPatent.

Serial No. 494,078.

gine; Fig. 8, is a plan view of a box in connection with Fig. 6; Fig. 9,is a front elevation of a centrifugal governor in connection with theengine; Fig. 10, is a side elevation thereof; Fig. 11, is a frontelevation of a torque governor in connection with the engine, and Fig.12, is a side elevation thereof.

Similar figures refer to similar parts throughout the several views.

A frame-work 1, consists of a base 2, pedestals 3, and webs 5. Thepedestals 3, are provided with journal-boxes 6 and 7, for a shaft 8, onwhich is fixedly mounted a piston-wheel or rotor 9, consisting of disks10,

a cylindrical surface 12, of a smaller diameter than those of the disks,which are tapered as at 13, to form a peripheral groove 15. In thegroove 15, are mounted vanes 16, and on the side faces 17, of the disks10, are mounted cams 18.

The webs 5, of frame 1, are joined by plates 19, bolted thereto as at20. From the plates 19 are extended valve-boxes 21, joining the'webs 5,and are provided with cylinders 22, for pistons 23, and with cylinders24, for pistons 25, of shoes 26, spanning the piston 9, as at 27. Thevalve-boxes 21, are provided with chambers 28, immediately over thecylinders 22, and have ports 29, over which are tapped pipes 30,provided with valves 31, and ports 32, which connectthe chambers 28,with the cylinders 22. Discharge orifices 33, through the pistons 23,and immediately under the ports 32, connect the cylinders 22, withthepiston groove 15. Auxiliary orifices 37, in the pistons 25, connect thecylinders 24, with the piston groove 15.

The shoes 26, are provided with exhausts 34, and with slide-channels 35,for slides 36. The slides 36, are provided with arms 38 and 39, on theirtops 40, and have vanes 41, shaped to fit the groove 15, of piston 9. Tothe tops 40, of the slides 36, are pivoted bars 42, which are alsopivoted on legs 43, of levers 44, pivoted on brackets 47 which areprovided with arms 45 and 46. On the arms 45, are pivoted rods 48,connected with the pipe-valves 31, and on the arms 46, are pivoted rods49, connected with the valves 50, for the ports 32. On the arms 38, ofthe slides 36, are bolted bars 51, provided with noses 52 and 53, and onarms 39, of the non-reversible engine, are mounted bars Patented Dec.28, 1915.

54. The bars 51,. are provided with sockets 55, for bolts 57, on whichare revolubly mounted collars 59. The bars 54, are similarly providedwith sockets 56, for bolts 58, on which are revolubly mounted collars60. Coiled-springs 61 and 62, connect the bars 51 and 54, with thejournal-boxes 6 and 7 respectively. Brackets 67, provided with guides68, for the bars 51 and 54, are attached to frame 1.

The pipes 30, tapped over the ports 29, branch out of a main 69, tappedon to a reservoir 70, which is supplied with an explosive mixture by apump 71, connected through a pipe 72, with a carbureter 73, wherein theexplosive mixture is formed from air supplied by a pipe 74, and from gassupplied by a pipe 75.

The pump 71, is operated from an eccentric 76, mounted on shaft 8, andis free to revolve in a ring 77, on whose periphery is pivoted a pistonrod 78, which is also pivoted on a piston 80, of the cylinder 81. Thecylinder 81, is connected with the reservoir 70, through a port 79,controlled by a valve 82, fixed on a rod 83, passing through acoiled-spring 84, and slidingly mounted in a guide 85, of a bracket 86,within the reservoir 70, at 87.

Reservoir 70, is connected with the main 69, through a port 88,controlled by a valve 89, fixed on one end 90, of a rod 91, which passesthrough the reservoir 70, into a cylinder 92, where it is connected to apiston 93, connected with one end of a coiled-spring 94, whose other endis connected to a disk 95, slidingly mounted over a rod 96, providedwith a worm 97, to mesh. with the inside worm 98, of a hand-wheel 99,mounted over the disk 95.

A wheel 100, is revolubly mounted on shaft 8, and is connected with aring 101, of a disk 102, of a collar 103, by means of coiled-springs 104and 105. The collar 103, is slidingly mounted on a key 106, in the shaft8, and on the hub 108, of the wheel 100, and is provided with a tooth109, to move in groove 110, running slantingly from right to left aroundthe hub 108. The collar 103, has a groove 111, on its cylindricalsurface, for rockingly supporting an arm 112, of a lever 113, pivoted ona bracket 114, attached to the frame 1, at 115, which has also an arm116, pivoted on the rod 96. On the shaft 8, is also mounted a bevel-gear117, meshing with a bevel-gear 118, fixedly mounted on a spindle 119,revolubly supported in a bearing 120, of a bracket 121, attached to theframe 1, at 122. Over the spindle 119, is mounted a collar 123, providedwith a gr0ove124, wherein is movably pivoted an arm 125, of a lever 126,pivoted on a bracket 127, attached to the frame 1, at 128. An arm 129,of the lever 126, is free to rock in front of a plunger 130, of a socket131, in frame 1, at 132. In the socket 131, and over the plunger 130, isfixedly mounted a disk 133, and a coiledspring 135.

On the top 19, of the frame 1, is mounted a lug 136, provided withnotches 137 and 138, for a plunger 139, slidingly mounted in a bearing140, of a bracket 141, attached to a lever 142, and suspended by a link143, from a handle 144, pivoted on the lever 142, and further connectedtherewith by a coiledspring 145. The lever 142, is provided with arms146, 147, and is mounted on a pin 148, pivoted in a socket 149, of theframe 1, at 150. The arm 146, is pivoted on a rod 151, on which is alsopivoted an arm 152, of a lever 153, pivoted on web 5, at 160, and havingan arm 154, provided with a strip of spring steel 155, at 156, and has apin 157, for a recess 158, of a lip 159, pivoted on the arm 154, at 161.

Passing through the boxes 21, and within the explosion chambers 28, areterminals 162 and 163, separated by an arcing space 164, of a secondarycoil 166, of a transformer whose primary coil 167, is connected throughan electric generator 168, having a grounded terminal 169, and terminals170, for making and breaking a circuit at 171. To prevent any damage tothe circuit by the back pressure produced when the circuit is suddenlybroken condensers 240, are connected across the circuit.

In Figs. 5 and 7, are shown the necessary modifications to make theengine reversible, as will. appear from the following description. Aframe 1, consists of a base 2, pedestals 3, and webs 5. The pedestals 3,are provided with journal boxes 6, for a shaft 8, on which is fixedlymounted a rotor 9, consisting of disks 10, a cylindrical surface 12,which is of a smaller diameter than those of the disks, which arebeveled as at 13, to form a groove 15. In the groove 15, are fixedlymounted vanes 16, and on the side faces 17 of the disks 10, are mountedcams 18. The webs .5, of frame 1, are joined by plates 19, and extendingtherefrom are valve-boxes 21, joining the webs 5, only one of which isshown in cross section in Fig. 7, which are provided with cylinders 22,for pistons 23, and with cylinders 22", for plstons 23", of shoes 26,spanning the rotor 9. The valve boxes 21, are provided with explosionchambers 28, immediately over the cylinders 22, and have ports 29', overwhich are tapped gaspipes 30, provided with valves 31, and ports 32,which connect the chambers 28, with the cylinders 22. Discharge orifices33, through the pistons 23, and immediately under the ports 32, connectthe cylinders 22, with the rotor groove 15. Auxiliary orifices 37", alsoconnect the cylinders 22, with the groove 15, and are controlled byvalves 11". The valve boxes 21, are also provided with explosionchambers 28", cylinders 22", ports 29", under the pipes 30", valves3l,'ports 32", discharge orifices 33 through channels 23" and auxiliarychannels 37 controlled by valves 11.

The shoes 26, are provided with exhausts 34", and with slide channels35, and also with exhaust 34 and slide channels 35 A slide 36', guidedin the channel 35, is pivoted on a bar 42, which is pivoted on a leg 43,of a lever 44, pivoted on a bracket 47. The lever 44, has an arm 45, onwhich is pivoted a rod 48', connected to Valve 31, and an arm 46,pivoted on a rod 49, connected to valve 50'. A similar slide 36", guidedin channel 35", is pivoted on a bar 42, pivoted on a leg 43", of a lever44, pivoted on a bracket 47 The lever 44", has an arm 45", on which ispivoted a rod 48", connected with the valve 31", and an arm 46", pivotedon a rod 49", connected to valve 50". The slides 36, are provided witharms 39 carrying bars 54, passing through guides 68, of brackets 67, andcarry rollers 60, to permit cams 18 to pass under them. The slides 36",are similarly provided with arms 38", carrying bars 51 passing throughguides 68", of brackets 67 and carry rollers 59", for the cams 18, topass under them. The arms 38", are provided with noses 52" and 53".

Except as described above, the reversible engine is, in every otherrespect, similar to the non-reversible engine, except that it isprovided with two starting devices, designated by X and Y respectively,for starting the engine in any one of two directions, by-

throwing one of said devices to the off position before the other isthrown to the on position. Thus in Fig. 5, starting device X, is shownin the off position and Y in the on position, for causing the piston torevolve in the direction of the arrow. To reverse the direction, Y mustfirst be thrown to the position parallel with X, after which X is firstthrown to the right and then immediately to the extreme left.

In describing the operation of this gas engine, I assume an explosivemixture formed in carbureter 73, from air and gas flowing thereinthrough pipes 74 and 75, forced by the pump 71, in the reservoir 70,thence through the pipe 69, into pipes 30, and chambers 28, where it isexploded by a spark in the arcing space 164, and the exploded mixture isforced through the discharge orifices 33, striking the vanes 16, whichcauses rotor 9, to revolve with the shaft 8. The eccentric 76, fixedlymounted on the shaft 8, revolves in ring 77, and produces areciprocating motion in piston rod 78, on which piston 80, is pivoted,which is caused to move up and down in cylinder 81, of pump 71. Whenpiston 80 moves up, the

explosive mixture flows into the cylinder 81, of pump 71, fromcarbureter 73, by opening valve 200. WVhen the piston 80, moves down,the mixture is forced into the reservoir 70, through port 79, as valve82, is forced out of the port by the downward pressure of the mixture,at the same time closing valve 200. On the up stroke of piston 80, thevalve 82, closes the port 79, by the spring 84. The reservoir is thusfilled with a mixture at a given pressure which is regulated by a pipe201, forming a by-path for any surplus. \Vhen port 88, of reservoir 70,is opened by spring 94, forcing the piston 93 down, thereby forcing downthe valve 89, connected therewith by rod 91, the mixture continues toflow through the port 88, in pipe 69, part of it flowing through elbow202, in cylinder 92, until the pressure of the mixture overcomes that ofthe spring 94, when piston 93, is forced up, causing rod 91, to pull upvalve 89, and closing port 88. The mixture continues to flow throughpipe 69, distributing itself through pipes 30, leading out of pipe 69,whose number depends upon the number of boxes around the rotor 9. As thepiston wheel 9, revolves, the cams 18, mounted on the face 17, passunder the rollers 59, mounted on pins 55, of bars 51, mounted on arms38, of slides 36, which are caused to slide outwardly in shoe 26. Thisoutward movement of slide 36, causes an upward movement of bar 42,pivoted thereon. This causes leg 43 of lever 44, to move upwardly, itsarm 45, forcing the rod 48, to cause valve 31, of pipe 30, to open port29, of chamber 28, while the arm 46, pulls on rod 49, for causing valve50, to close port 32, and the mixture from pipe 30, flows in chamber 28.When the cam 18, and Vane 16, pass slide 36, the spring 61, whichconnects arm 51, with journal box 6, of frame 1, causes'slide 36, tomove inwardly and the operation is reversed, valve 31, closing port 29,and valve 50, opening port 32. The vane 41, of slide 36, fits closelythe groove 15, and the vane 16, is just past the discharge 33. Themixture thus becomes distributed through chamber 28, discharge 33, andthe piston groove 15, between vane 41, of slide 36, and the vane 16. Atthe same time a circuit is made and broken at 171 causing a spark in thearcing space 164, which explodes the mixture and the pressure of theexploded mixture against vane 16 causes the rotor to revolve. A portionofthe exploded mixture distributes itself over the piston 23, pressingthe shoe against the rim of the wheel 9, to prevent leakage, and as Wine16, passes by auxiliary orifice 37, a portion flows through 37 anddistributes itself over the piston 25, to hold the shoe down until vane16 passes the exhaust 34 when it is exhausted through exhaust pipe 203.

When the engine is in operation the plunger 139 is in notch 137 of lug136, and lip 159 is on a line with arm 154. To stop the engine thehandle 144 is pressed against lever 142 lifting plunger 139 out of notch137 when the lever can be thrown to the right until notch 138 isreached, when handle 144 is released causing plunger 139 to plunge innotch 138. As the lever 142 is thus swung, the arm 146 is moveddownwardly, which causes rod 151 to move downward, causing arm 152 oflever 153 to move' down and arm 154 to move up, which causes lip 159, topress on nose 53, of arm 51, to lift out slide 36, of groove 15, at thesame time closing port 32, for preventing the mixture from flowingthrough the discharge 33. To start the engine, the plunger is removedfrom the notch 138, and moved farther to the right, which causes lip159, to press against nose 53, causing lip 159, to swing on pin 161,until it slips out from under nose 53. \V hen the lever 142, is thrownback to its operating position, spring 155, presses lip 159, down to itshorizontal position, and slide 36, moves inwardly, causing lever 44, torock. During this operation the mixture is exploded and the rotorreceives an impulse, when the engine continues to operate as describedabove.

It should be noticed that the lines of contact between any one shoe as26, the portion of the periphery it spans as 2727 the slide as 36, andthe groove 15 of the rotor 9, must be gas tight, and must not bedisplaced by the pressure produced by the explosion. This isaccomplished with the aid of the pistons 23 and 25, and their orifices33 and 37 by the downward pressure on the shoe caused by the explodedmixture. The wear between the rotor 9, and that of any one shoe 26 istaken up by the same pressure, and that I of the groove 15, and the vane41, of the 'der the nose 52.

slide 36, is taken care of by the springs 61 and 62.

To prevent the engine from racing, the centrifugal governor illustratedin Figs. 9 and 10, may be used to advantage. Any increase of the speedof the shaft 8, is transmitted to the spindle 119, of the governor, bythe gears 118 and 123 to cause the governor balls 300 to fly outwardlyby centrifugal force causing the lever 126, to rock forcing the plungerinwardly, to catch un- This would prevent the slides from descendingthereby preventing an explosion in the explosion chamber, which wouldresult in a decrease of the speed. The decrease in the speed would causethe balls to collapse, and cause the plunger to release the slide,allowing its Vane to drop in the V groove which would result in firingthe explosive mixture in the chamber.

A'standard engine of this character, should preferably be provided withthree boxes and with two vanes, which would result in one explosionfollowing another, to

cause the piston wheel or rotor to rotate by a constant pressureproduced by the explosions, always having one of its vanes in a positionto be acted upon by the exploded gas. In a two'vane engine there wouldbe two explosions per revolution, per explosion chamber which is allthat could be taken care of by a high speed engine. Engines for veryhigh speeds should preferably have only one vane, which would give oneexplosion per revolution per explosion chamber. Very large engines ofmoderate speed, could be provided with more than two vanes, and withmore than three boxes. The number of boxes and vanes would depend uponthe size and speed of the engine, but the construction, operation andcontrol would be the same, except as to some minor changes in connectingup the governors and starting devices.

In Fig. 2, the operating lever 142, has an arm 146, on which is pivoteda rod 151, also pivoted on an arm 152, of a lever153, for operating theslides of one of the boxes. For operating the slide of the next box, abracket 212, as shown in Fig. 4, is substituted for the arm 152, and arod 205, is pivoted between the rod 151, and the lever 153. Foroperating the third box, a rod 206, is

pivoted on an arm 147, of operating lever notch 137", of the lug 136,and the lever 105 142', is held in a vertical position, by the plunger139, in the central notch 138'. This arrangement would allow the engineto revolve in the direction of the arrow. Forv reversing the direction,the lever 142", is 0 thrown to the vertical position, its plunger 139",catching in the central notch 138, which is the off position.- Theplunger 139, is then released from the central notch, when lever 142, isthrown to the right, for lifting 315 the slides, and then to the left,until its plunger 139, is in notch 137, which releases the slides andcauses the engine to start in the opposite direction.

For the purpose of'regulating the speed, 120

of the reversible engine, two centrifugal governors are preferably used,only one being shown in Fig. 5, where it is shown connected forregulating the speed when the engine is running in the direction of thearrow. A similar governor, similarly connected, may be assumed to bemounted on the obverse side for regulating the speed when the engine isrunning in the opposite 13 direction.

The centrifugal governors are all alike, whether used in connection withthe reversible, or with the non-reversible engines.

To provide for close speed regulation under a variable load, as would bethe case in using the engines in connection with electric generatorsoperated in parallel, or in operating a propeller of a boat, the torquegovernor, shown in Figs. 1, 11, and 12, could be advantageously used.Assuming the wheel 100, revolubly mounted on the shaft 8 to be belted orotherwise coupled on to some variable load, should there occur a suddenincrease in the load, it would tend to check the speed of the wheel. Theengine shaft 8 being free to revolve within the hub 108 of the wheel 100would tend to continue at the speed it acquired before the check on thewheel, and would take along the collar 103, keyed thereon, causing itstooth 109 to slide forwardly in groove 110 of hub 108, inclined in thedirection of the wheel. The collar 103 being free to slide along theshaft, would cause the arm 112, pivoted in groove 109 of the collar 103,to swing in the same direction, which would cause the arm 116 to swingdownwardly, compressing the coiled spring 94, which would cause thepiston 93 to move down in the cylinder 92 and the rod 91, connecting thepiston 93 with the valve 89 would cause it to move down and to open theport 88, which would result in gas flowing through pipe 69 and pipes 30to the explosion chamber 28. This would result in increasing the forceof the explosions, resulting in an increase of the turning power of theshaft which would pull the collar 103 with it, and transmit the pull tothe wheel 100, through the coiled spring 105, connecting the wheel 100with the collar 103.

Should the load be thrown off the belt, the speed of the wheel 100 wouldincrease. The wheel would therefore tend to run ahead of the shaft, andcause the tooth 109 of the collar 103 to move rearwardly in channel 110,thereby causing it to slide on the shaft 8 to the right, causing arm 112to swing to the right. The arm 116 would be caused to swing upwardly,and pull the rod 96 up wardly, transmitting this motion through thespring 94: of the piston 93 and the rod 91, to valve 89, thus closingport 88. The supply of gas would thereby be cut off, resulting in theslackening of the speed of the shaft 8 and the collar 103 keyed thereonwould cause a slackening of the speed of the wheel through the pullexerted thereon by the coiled springs connecting the collar with thewheel. As long as the load remains constant, the wheel 100 revolves atthe same speed as that of the shaft 8 being balanced by the coiledsprings 104 and 105.

The speed of such an engine could also be regulated. by hand when usedon automobiles, railroad locomotives, or the like, by

varying the supply of gas in the explosion chambers. As the gas in theexplosion chambers is supplied through pipes leading out of a main 69,tapped on the reservoir 71 over the port 88, the supply would dependupon the speed with which the valve 89 is operated, the valve 89 beingconnected through the rod 91 with the piston 93 of the cylinder 92.Assuming therefore the port 88 to be open, the gas from reservoir 71would flow through port 88. in pipe 69 and through elbow 202 in cylinder92. The gas in cylinder 92 would cause a pressure on its piston 93 andcause it to move up, and compress spring 9% connecting the piston withthe rod 96. After an explosion some of the gas in pipe 69 would be usedup, causing a decrease in pressure and the spring would then cause thepiston to move down, which would result in the opening of the port 88.The supply of gas would thus depend upon the tension of the spring 96.As the tension of the spring depends whether the coils are compressed orexpanded, a wide range of speed may be obtained by turning thehand-wheel 99 which is provided with a worm 98 to mesh with the w orm 97of thread 96.

When the hand-wheel 99 is turned downwardly so as to increase the lengthof the rod 96, the spring 94. would become compressed which wouldnecessitate a greater pressure in the cylinder to force the piston tomove up to cause the valve 89 to close the port 88, allowing more gas toflow, for increasing the speed. When the hand-wheel is turned in theopposite direction so as to shorten the rod the spring would expand anda lesser amount of pressure would be suiiicient to force the piston upwhich would have the further effect of cutting off the supply of gasquicker, resulting in the engine running at a lower speed.

To prevent the reservoir pressure from becoming abnormal a safety valve225 is mounted on a pin 226 pivoted in the pipe 201. On pin 226 ismounted a lever 22? for holding a weight 229. The weight would keep thevalve closed to prevent the gas from the reservoir from flowing throughthe pipe 201, except when the pressure became very high, when it wouldovercome the action of the weight and open the valve. Pipe 201 is tappedon a pipe 228 leading into reservoir 70.

Pipe 228 is provided with a nipple 230 for connecting a hand pump forpumping gas in the reservoir when a new engine is to be started or whenan engine is emptied for repairs, or when the reservoir becomes emptiedfor any other reason. The nipple is controlled by a valve 231 forclosing it and with a valve 232 which would permit gas from the pipe toflow within the reservoir but would prevent the flow of gas from thereservoir into the pipes.

Having thus described this invention,

what I claim as new and desire to protect by Letters Patent, is

1. A rotary engine consisting of a frame provided with pedestal websextending therefrom and journal boxes formed therein, a shaft revolublymounted in the boxes, a rotor mounted on the shaft, boxes extended fromthe frame, shoes spanning the rotor, and slidingly supported by theboxes, chambers having ports provided by the boxes, pipes leading intothe chambers and over the ports, valves for closing and opening theports, cylinders under the chambers, ports connecting the cylinders withthe chambers, valves for closing and opening the ports, shoepistonsslidingly mounted in the cylinders and provided with discharge orificesand with auxiliary orifices, slide channels formed in the shoes. slidesmounted therein, and exhausts provided by the shoes.

2. A rotary engine consisting of a frame provided with pedestals andwebs, journal boxes formed in the pedestals, a shaft journaled in theboxes, a rotor fixedly mounted on the shaft, a box extending from theframe mounted over the piston and provided with cylinders, a shoespanning the rotor movably mounted between the box and the rotor andprovided with pistons for the cylinders, gas chambers within the box andover the pistons, ports connecting the chambers with the cylinders,orifices through the pistons and under the ports, pipes leading into thechambers, ports connecting the chambers with the pipes, valvescontrolling the ports, valve controlled auxiliary orifices through thepistons, exhausts, and slide channels provided by the shoe, and slidesmounted in the slide channels.

3. A rotary engine consisting of a frame provided with pedestals andwebs, journal boxes formed in the pedestals, a shaft journaled therein,a rotor mounted thereon, a box joining the webs, two cylinders formed inthe box, a shoe provided with pistons for the cylinders, a chamberwithin the box and over one of the cylinders, a pipe leading into thechamber, a port connecting the chamber with the cylinder, a portconnecting the chamber with the pipe, valves controlling the ports, adischarge orifice through the piston mounted in the cylinder under thechamber, an auxiliary orifice through the piston of the other cylinder,a slide channel through the shoe ahead of the piston provided with thedischarge orifice, and an exhaust through the shoe to the rear of theplston provided with the auxiliary orifice. I

4. A rotary engine consisting of a frame, pedestals and webs, journalboxes provided by the pedestals, a shaft j ournaled therein, a groovedrotor fixedly mounted thereon, a box provided by the frame joining thewebs, a shoe slidingly mounted between the rotor and the box, a chamberwithin the box, a pipe connecting with the chamber, a port between thechamber and the pipe, 2. slidingly mounted valve for controlling theport, a cylinder under the chamber, a port between the chamber and thecylinder, a shoe provided with a piston slidingly mounted in thecylinder, a discharge orifice through the piston between the cylinderand the rotor groove, a box cylinder, a shoe piston slidingly mountedtherein and an orifice connecting the cylinder with the rotor groove, aslide channel in front of the discharge orificed piston, a slideguidingly mounted therein and an exhaustto the rear of the auxiliaryorificed piston.

5. A rotary engine consisting of a frame, I

pedestals provided thereby, webs extending therefrom, journal boxesformed in the pedestals, a shaft journaled therein, a grooved rotorfixedly mounted thereon, a vane mounted in the groove, a box provided bythe frame, a slidingly mounted shoe span ning the grooved rotor andunder the box, a gas chamber within the box, a pipe tapped on the boxand over the chamber, a port between the chamber and the pipe and avalve for controlling the port, a box cylinder under the chamber, a portbetween the chamber and the cylinder, a shoe piston slidingly mounted inthe cylinder, a discharge orifice connecting the cylinder -with therotor groove, a box cylinder, a shoe piston slidingly mounted thereinand an auxiliary orifice between the cylinder and the groove, a slidechannel through the shoe along a radius through the center of the rotor,a slide guidingly mounted therein, and an exhaust through the shoe.

6. A rotary engine consisting of a frame comprising pedestals, webs andjournal boxes formed in the pedestals, a shaft journaled in the boxes, arotor fixedly mounted thereon, a conical groove around the periphery 0fthe rotor, a radial vane fixedly mounted in the groove, a shoe spanningthe rotor over the groove and provided with a radial channel and with anexhaust, a radial slide guidingly mounted in the channel, shoe pistons,provided by the shoe between the slide channel and the exhaust orificesthrough the pistons, a box provided with cylinders for the pistons andwith explosion chambers over the cylinders, ports between the chambersand the cylinders, valves for controlling the ports, pipes leading tothe chambers, ports between the chambersand the pipes, and valves forcontrolling the ports.

7. A rotary engine comprising a frame having pedestals provided withjournal boxes, a shaft journaled therein, a frame box, a slidinglymounted shoe and a rotor consisting of cylindrical disks, a concentriccylinder of lesser diameter than those of the disks joining them to forma groove, radial vanes fixedly mounted on the rotor, and camsconcentrically mounted on the disks and immediately below the groove.

8. A rotary engine comprising a frame, consisting of pedestals providedwith journal boxes, a shaft journaled therein, a rotor provided withconcentric cams mounted around the rotor, a box projecting from theframe, a shoe slidingly mounted between the box and the rotor andprovided with a channel for a slide consisting of a top projectingupwardly above the shoe, arms horizontally projecting from the top, rodssuspended from the arms and provided with sockets, bolts passing throughthe sockets, collars mounted on the bolts, and coiled springs joiningthe sockets with the journal boxes.

9. A rotary engine comprising a frame consisting of pedestals providedwith jourthe bracket, a rod pivoted on the leg, a shoe provided with aslide channel slidingly mounted between the box and the rotor, a slidepassing through said channel and provided with a top pivotally connectedwith the leg of the pivoted arm.

10. X rotary engine comprising a frame consisting of pedestals, providedwith journal boxes, a shaft journaled therein, a rotor mounted thereon,boxes extending from the frame, chambers within the boxes, cylindersunder the chambers, pipes leading to the chambers, ports between thechambers and cylinders. ports between the chambers and pipes. valves forcontrolling the ports and mounted on rods, brackets attached to theboxes, levers vertically pivoted thereon and provided with a leg andwith two arms at right angles to the leg for pivoting the valve rods,shoes provided with pistons slidingly mounted in the box cylinders andwith slide channels, slides passing through the channels and rods forpivotally connecting the slides with the lever legs.

11. A rotary engine comprising a frame consisting of pedestals providedwith journal boxes, a shaft journaled therein, a grooved rotor mountedthereon, vanes mounted in the groove, cams mounted on the rotor, a shoespanning the-rotor and mounted over its groove, a slide channel throughthe shoe, a piston provided with a discharge orifice and a pistonprovided with an auxiliary orifice extending above the shoe. an exhaustpassing through the shoe, a box provided with cylinders for the shoepistons fixedly extending from the frame and over the shoe, a chamberwithin the box and over the cylinder for the discharge orificed piston,a pipe leading to the chamber, a port between the chamber, and thecylinder, a port between the chamber and the pipe, valves forcontrolling the ports, a bracket attached to the box, a lever consistingof a leg and of two arms at right angles to the leg pivoted on thebracket, rods pivoted on the leg, a slide mounted in the slide channelof the shoe and provided with a vane for the groove of the rotor andpivoted on the rod pivoted on the lever leg, arms extending from theslide, rods provided with sockets supported from the arms, and coiledsprings connecting the rods with the journal boxes.

12. In a rotary engine a frame comprising a base, pedestals supported onthe base, journal boxes formed in the pedestals, a shaft journaledtherein, an eccentric fixedly mounted on the shaft, a ring encirclingthe eccentric, a piston and a rod connecting it with the eccentric ring,a cylinder for said piston, a pipe provided with a valve tapped on saidcylinder, a reservoir connected by a port with said cylinder, a springactuated valve controlling said port, a pipe leading out of thereservoir, a port connecting the reservoir with the pipe, a valvecontrolling the port, a cylinder mounted on the reservoir, an elbow pipeconnecting the reservoir pipe with the cylinder, a piston mounted insaid cylinder, a rod connecting the said piston with the port valve, arod and a disk slidingly mounted thereon, a coiled spring connecting thepiston with the disk, a box provided with a chamber, a pipe connectingthe chamber with the reservoir pipe, a port between the chamber and saidpipe, a Valve for controlling the port, a cylinderunder the chamber, aport between the chamber and the cylinder, a valve controlling the port,a bracket and a lever provided with arms and with a leg at right anglesto said arms pivoted on the bracket, rods pivotally connecting thechamber valves with the lever arms, a grooved rotor fixedly mounted onthe shaft, a shoe provided with a piston slidingly mounted in the boxcylinder, a discharge orifice through the piston for connecting the boxchamber with the rotor groove, a slide channel, a slide passing throughsaid channel and provided with a vane for the piston groove, a rod forpivoting the slide on the lever leg, slide arms, rods suspended from thearms and springs connecting the arms with the journal boxes, one or morevanes fixedly mounted in the groove of the rotor, cams mounted on therotor exterior to the groove and below the vanes. a box cylinder, a shoepiston for the cylinder and an auxiliary orifice through said pistonconnectingthe cylinder with the rotor groove, and an exhaust passingthrough the shoe.

13. In a rotary engine a frame provided with pedestals having journalboxes, a shaft journaled in the boxes, a grooved rotor fixedly mountedon the shaft to revolve therewith, a box projecting from the frame, ashoe slidingly mounted under the box and spanning the rotor over itsgroove, a chamber Within the box, a pipe leading to the chamber, a valvecontrolled port connecting the pipe with the chamber, a cylinder underthe chamber, a valve controlled port connecting the chamber with thecylinder, a shoe piston slidingly mounted in the cylinder, a dischargeorifice through the piston connecting the cylinder with the rotorgroove, a vane fixedly mounted in the groove, a vane extending from aslide and a spring for causing the slide vane to fit in the pistongroove, a cam mounted on the rotor, to cause the slide vane to move outof the groove to allow the rotor vane to pass the slide vane.

14. A rotary engine comprising a frame, pedestals supported by the frameand provided with journal boxes, a shaft journaled therein, a groovedrotor fixedly mounted thereon, a shoe slidingly mounted over the rotor,a vane fixedly mounted in the rotor groove, a slide provided with a vaneslidingly mounted in the shoe, a spring for causing the slide vane tofit within the rotor groove to serve as a stationary-backing for thefixedly mounted vane when it is past the slide vane, a box extendingfrom the frame and over the shoe, a chamber within the box, a pipeleading to the chamber, a valve controlled port connecting the pipe withthe chamber, a cylinder under the chamber, a valve controlled portbetween the cylinder and the chamber, a bracket mounted on the box, alever provided with two arms and with a leg pivoted on the bracket, arod pivoted on one of the arms for operating the pipe port valve, a rodpivoted on the other arm for operating the cylinder port valve, a rodpivot'ally connecting the vane-slide with the lever leg, a spring formoving the slide vane in the rotor groove for rocking the lever to causethe cylinder port valve to close the cylinder port at the same timecausing the pipe port valve to open its port, a cam to lift the slidevane out of the rotor groove to i let the fixed vane pass for causingone valve to open the pipe port and the other valve to close thecylinder port.

15. A rotary engine consisting of a frame,

pedestals provided with journal boxes, a

valve and a. cylinder port valve and a means for manipulating the valvesfor closing one of the ports and at the same time opening the other one.

' 16. In a rotary engine a frame, pedestals supported by the frame andprovided with journal boxes, a shaft journaled therein, a rotor mountedthereon and provided with. a groove consisting of a cylindrical bottomand of tapered Walls, a vane fixedly mounted in the groove, a shoespanning the groove and provided with pistons, a box provided withcylinders for the pistons, a chamber within the box and over one of thecylinders, a port connecting the chamber with the cylinder, a pipeleading to the chamber, a port connecting the chamber with the pipe,valves for closing either one of the ports when the other one is opened,a bracket mounted on the box, a lever pivoted thereon and provided witharms and with a leg, a slide provided with a vane, a spring for causingthe slide vane to move in the rotor groove, a cam mounted on the rotorfor cans-- ing the slide to move its vane out of the groove to allow thefixedly mounted vane to pass the slide vane, a means for opening thepipe port and for closing the cylinder port when the slide vane is outof the rotor groove, and to reverse the operation when the slide vane isin the rotor groove.

17. A rotary engine consisting of a frame supporting pedestals providedwith journal boxes, a shaft journaled in ;-the boxes, a grooved rotorfixedly mounted on the shaft to revolve therewith and provided-with avane fixedly mounted in the groove, a box extending from the frame, achamber within the box,.a pipe leading to the chamber, a portconnecting' the pipe with the chamber, a valve for closing and openingthe port, a

cylinder under thetchamber, a port connect ing the cylinder with thechamber, a valve for closing and opening the port, a shoe mounted underthe box and over the rotor groove and provided with a channel for aslide, with a piston forthe cylinder port connected with the chamber,with a piston for a closed cylinder and with an exhaust, a slide mountedin the slide channel and provided with a vane free to move in and out ofthe rotor groove, a cam mounted on the rotor to cause the slide vane tomove out of the groove to permit the rotor vane to pass the slide vaneand a spring for causing the slide vane to fit in the groove.

18. In a rotary engine a'revoluble grooved rotor provided with a fixedvane, a shoe slidingly mounted over the rotor and spanning the grooveprovided with pistons, a box provided with cylinders for the shoepistons to slide in, a gas chamber within the box and over one of thecylinders, a pipe for supplying gas to the chamber, a port forpermitting the gas from the pipe to flow into the chamber, a port forpermitting the gas from the chamber to flow into the cylinder, adischarge orifice through the piston of the cylinder under the chamber,a slide provided with a vane for the groove, a means for permitting thefixedly mounted vane to pass the slide vane. a valve for opening andclosingthe port between the chamber and the pipe, a valve for closingand opening the port between the chamber and the cylinder, a means formanipulating the valves for filling the chamber with gas and forconveying the gas within the rotor groove when the fixedly mounted vaneis past the discharge orifice and when the slide vane is in the rotorgroove.

19. In a rotary engine, a grooved rotor provided with a fixedly mountedvane in the groove to revolve with the rotor, a nonrevoluble shoeprovided with pistons slidingly mounted over the rotor groove andspanning the rotor, a shoe provided with a slide channel, a slideprovided with a vane for the groove slidingly mounted in the slidechannel, a box mounted over the shoe and provided with cylinders for theshoe pistons, a chamber over one of the cylinders, and a dischargeorifice through the piston of said cylinder, an auxiliary orificethrough the piston of the other cylinder, a port for con veying gas fromthe pipe into the chamber, aport for conveying gas from the chamber intothe cylinder and through the piston orifice into the rotor groove whenthe fixedly mounted vane is past said orifice, valves controlling theports, a means for manipulating the valves for filling the chamber withgas when the fixedly mounted vane is past said orifice for causing saidvane to move past the auxiliary orifice, and an exhaust through the shoeconnecting the groove with the atmosphere for exhausting the gas fromthe groove when the fixedly mounted vane is past said exhaust.

20. In a rotary engine, a grooved rotor provided with a fixedly mountedvane in the groove to revolve with the rotor, a nonrevoluble slidinglymounted shoe over the groove and spanning the rotor carrying pistons, abox over the shoe provided with cylinders for the shoe pistons, a gaschamber provided with ports controlled by valves for filling the chamberwith gas and for conveying the gas from the chamber, a discharge orificethrough one of the shoe pistons for conveying the gas into the rotorgroove, a slide provided with a vane to be within the groove when thefixedly mounted vane is past the discharge orifice for holding the gasin the cylinder above the piston, in the discharge orifice and in thegroove, an auxiliary orifice through the other shoe piston to convey gasfrom the groove into the cylinder over the piston when the fixedlymounted vane is past said auxiliary, orifice to cause a gas tightcontact between the groove, the shoe and the vanes while the fixedlymounted vane is being swept past the shoe, and an exhaust for exhaustingthe gas when the fixedly mounted vane passes from under the shoe.

21. In a rotary engine, a grooved rotor, a slidingly mounted shoe overthe groove spanning the rotor and provided with a slide channel, with anexhaust and with pistons between the slide channel and the exhaust, aslide mounted in the slide channel and provided with a vane for movablyfitting the rotor groove, and vanes fixedly mounted on the rotor.

22. In a rotary engine, a rotor provided with a groove around itscylindrical surface, slidingly mounted shoes spanning the rotor over thegroove and provided with slide channels, with exhausts and with pistonsbetween the channels, vanes fixedly mounted on the rotor and at suchintervals apart, that when one of the vanes is past an exhaust of oneshoe another vane is between the pistons of another shoe.

23. In an engine, a frame, pedestals provided by the frame, journalboxes formed in the pedestals, a shaft journaled in said boxes, agrooved rotor mounted on the shaft, slidingly mounted shoes spanning thepiston and over the groove, boxes extending from the frame mounted overthe shoes, gas chambers within the boxes, pipes leading into thechambers, a gas reservoir .and a pipe connecting the reservoir with thechamber pipes, a port between thereservoir and the pipe, a valve forclosing and opening the port, a cylinder mounted over the reservoir, anelbow pipe connecting the reservoir pipe with the cylinder, a pistonmounted in the cylinder, a rod connecting the piston with the portvalve, a rod, a disk slidingly mounted thereon, and a coiled springconnecting the disk with the piston.

24. In combination with an engine con a reservo1r and a pipe connectingthe reservoir with the chamber pipes, a valve controlled port betweenthe reservoir and the pipe, a cylinder mounted on the reservoir, anelbow pipe connecting the. reservoir pipe with the cylinder, a pistonmounted in the cylinder, a rod connecting the port valve with thepiston, a rod, a disk slidingly mounted thereon, a coiled springconnecting the disk with the piston for forcing the piston down thecylinder for cai'lsing the 1 piston rod to actuate the valve for ex ningthe port to allow gas from the reservoir into the pipe and through theelbow pipe into the cylinder to generate a pressure for forcing thepiston up to close the port valve,

I 65 with arms, rods mounted on the arms, a

- a speed varying device consisting of an outer worm on the disk rod,and a hand wheel provided with an inner worm meshing with the rod wormfor varying the tension of the spring.

25. In an engine, the combination of a frame, pedestals supportedtherebvand provided with journal boxes, a shaft having a rotor fixedlymounted thereon journaled in the boxes, a box provided with gas chambersand with cylinders, a shoe provided with pistons slidingly mounted inthe box cylinders and provided with a slide channel, a slide slidinglymounted therein provided with two arms, rods attached to the arms andprovided with noses, brackets attached to the frame and provided withguides for the rods, and lips under the noses for moving the rodsoutwardly, of a starting device consisting of a lever mounted on a pinpivoted on the frame, a rod pivoted on the lever and pivotally connectedwith levers pivoted on the frame and provided with pins for pivoting thelips and for pivotally supporting said lips for pressing the noses ofthe rods to cause the rods to move outwardly and for allowing 'the lipsto slip from under the noses, and spring steel strips attached to thelip levers for causing the lips to assume a position on a line with saidlevers.

' 26. In an engine, the combination of a frame, pedestals supportedthereby and provided with journal boxes, a shaft provided with a fixedlymounted rotor journaled in the boxes, a shoev spanning the rotor andprovided with pistons, a box extending from the frame and provided withcylinders for the shoepistons, a lug provided with notches mounted onthe frame, a lever pivoted on the frame, a handle pivoted on the lever,a spring connecting it with the lever, and a plunger suspended from thehandle over said notches.

27. In combination with an engine comprising a stationary part, aslidingly mounted and a rotating part, a starting and stopping devicefor the @tating part and consisting of a lever mounted on a pin pivotedon the stationary part and provided with arms, rods pivoted on the arms,levers pivoted on the stationary part and pivotally connected with therods pivoted on the lever and provided with pins and with a spring, alip pivoted on one of the pins and under the spring and provided with arecess for rocking about the other pin.

28. In an engine consisting of a frame, pedestals, journal boxes, and ashaft, a rotor mounted on the shaft, a box extending from the frame, ashoe slidingly mounted between the box and the rotor and provided with aslide channel, a=slide slidingly mounted in said channel and providedwith a vane and -.a spring connecting the handle with the lever, aplunger suspended from the handle and free to engage the notches of alug mounted on the frame.

29. In a rotary engine, a frame, pedestals supported thereby, andprovided with journal boxes, a shaft journaled therein. a bevel gearmounted on the shaft, a bracket attached to the frame, and provided witha bearing, a spindle mounted therein, a bevel gear fixedly mounted onthe spindle and meshing with the shaft gear, a collar pro vided with agroove slidingly mounted on the spindle, a ball governor supported bythe spindle and over the collar, a bracket mounted on the frame, a leverpivoted on the bracket and provided with two arms one of which isrockingly supported in the collar groove, a frame socket, a plungerpassing through the socket and in front of the other lever arm, a diskwithin the socket fixedly mounted on the plunger and a spring in thesocket and over the plunger.

30. In a rotary engine, a frame, pedestals supported thereby, andprovided with jours nal boxes, a shaft journaled therein, a rotorfixedly mounted thereon, .boxes extending from the frame, shoesslidingly mounted between the boxes and the rotor and provided withslide channels, slides mounted-in said channels and provided with vanes,arms projecting from said slides, rods suspended from the arms, nosesmounted on the rods, sockets provided by the frame, plungers passingthrough the sockets and in front of the noses, springs within thesockets and over the plungers, brackets attached to the frame, leverspivoted on the brackets, a bracket provided with a bearing and attachedto the frame, a spindle rotatably supported by the bearing, a gearfixedly mounted on the shaft, a gear fixedly mounted on the spindle andmeshing with the shaft gear, a collar slidingly mounted on the spindleand provided with a groove for revolvingly supporting the arms of thelevers pivoted on the frame brackets.

31. In an engine, a frame, pedestals supported thereby and provided-withjournal boxes, a shaft journaled therein, a rotor fixedly mountedthereon and consisting of disks joined-by a concentric cylinder of alesser diameter than those of the disks forming a cylindrical bottom ofa groove whose walls are formed by the portions of the disks surroundingthe cylinder which portions are tapered to form obtuse angles with thecylinder and with their cylindrical sur-- faces, one or more vanesradially mounted in the groove, a shoe provided with pistons slidinglymounted. over the groove, a box extending from the frame and providedwith cylinders for the shoe pistons, chambers within the boxand over thecylinders, pipes leading to the chambers, a reservoir and a pipeconnecting the reservoir with the chamber pipes, a cylinder mounted onthe reservoir, an elbow joining the reservoir pipe with the cylinder, apiston mounted in the cylinder, a rod,"a disk mounted thereon and acoiled spring joining the piston with the disk, an eccentric fixedlymounted on the shaft and rotatingly mounted in a cylindrical ring, apiston and a rod reciprocatingly joining the piston with the ring, acylinder for the piston. and mounted over the reservoir and a supplypipe leading into the cylinder.

32. In a gas engine, a carbureter, an air and gas pipe leading therein,a cylinder and a pipe joining the cylinder with the carbureter, a pistonmounted in the cylinder, a shaft, a ring and an eccentric fixedlymounted on the shaft and revolubly mounted in the ring, a rodreciprocatingly joining the ring with the piston, a reservoir, a portjoining the cylinder with the reservoir, a pipe lead ing out of thereservoir, a port between the reservoir and the pipe, a pipe connectingthe reservoir pipe with the cylinder, a piston mounted in the cylinder,a rod, a disk mounted thereon and a spring connecting the piston withthe disk, a box, chambers within the box, pipes connecting the chamberwith the reservoir pipe, box cylinders under the chambers, a shoeprovided with pistons for i the cylinders and with exhausts, slidechannels between the exhausts and the pistons, a rotor, a groove aroundthe rotor, and vanes fixedly mounted in the groove.

38. In a gas engine, a frame, pedestals supported thereby and providedwith journal boxes, and a shaft journaled therein, a carbureter forforming an explosive mixture from air and gas supplied thereto, acylinder and a pipe provided with a valve connecting the carbureterwiththe cylinder for conducting the mixture from the carbureter into thecylinder and for preventing the return of the mixture into thecarbureter, a reservoir and a port connecting the reservoir with thecylinder, a piston slidingly mounted in the cylinder, a means to causethe piston to slide up for causing the mixture to flow from thecarbureter into the cylinder, and to cause the piston to slide down forcausing the mixture to flow from the cylinder into the reservoir throughthe connecting port, a valve provided with a spring for closing the porton theup stroke of the piston to cause the storing of the mixture in thereservoir, a pipe leading out of the reservoir, a port to allow themixture in the reservoir to flow in the pipe, a cylinder mounted on thereservoir, boxes extending from the frame and provided with gaschambers, a pipe connecting the reservoir pipe with the cylinder andpipes connecting it with the box chambers for conducting the mixturefrom the reservoir into the cylinder and into the chambers, a pistonslidingly mounted in the cylinder, a rod, a disk mounted thereon, aspring connecting the piston with the disk for causing the piston tomove down in the cylinder, a valve within the res ervoir for closing andopening the port between the reservoir and the pipe, a rod joining thepiston with the valve for causing the valve to open the port when thepiston is down in the cylinder to allow the mixture to flow from thereservoir into the pipe and into the cylinder, said gas to force thepiston up to cause the valve to close the port, cylinders under thechambers, a shoe provided with pistons slidingly mounted in thecylinders, and a rotor fixedly mounted on the shaft.

34. In a gas engine comprising a frame, pedestals supported thereby andprovided with journal boxes and a shaft journaled therein, a carbureterfor generating an explosive mixture, a reservoir and a pump for forcingthe mixture from the carbureter into the reservoir, a pipe leading fromthe reservoir, a port between the reservoir and the pipe, a valve forclosing and opening the port, a means for operating the valve to openthe port for causing the mixture to flow from the reservoir into thepipe and into the valve operating means, and for preventing the mixturefrom flowing out of the reservoir, a box extending from the frame, achamber within the box, a cylinder under the chamber and a pipeconnecting the chamber with the reservoir pipe, a port between thechamber and the pipe, a port between the chamber and the cylinder,valves for controlling said ports, and a means for opening the pipe portand for closing the cylinder port to allow the mixture to flow from thereservoir pipe through the chamber pipe and into the chamber, a shoeprovided with a piston slidingly mounted in the box cylinder, an orificethrough the piston and under the cylinder port,.a rotor provided with agroove fixedly mounted on the shaft to revolve therewith, a vane fixedlymounted on the rotor, a slide channel through the shoe and a slideprovided with a vane passing through the shoe to pro ect within thegroove when the fixedly mounted vane is past the shoe piston to form anpact chamber, a means for closing the pipe port and for opening thecyllnder port to allow the mixture to flow from the chamber in thecylinder, over the piston, through the orifice andinto the impactchamber.

35. In a gas engine, a frame, pedestals supported thereby and providedwith journal boxes, a shaft journaled therein, a reservoir, mainexplosive mixture generating means, a meansoperated from the shaft forforcing the mixture from the generating means into the reservoir, a pipefor conveying the mixture from the reservoir, a valve controlled portbetween the reservoir and the pipe, a cylinder and a piston slidinglymounted therein, a spring for producing a down stroke on the piston foropening the port vvalve, to allow the mixture to flow from the reservoirin the pipe, a pipe connecting the reservoir pipe with the cylinder forconveying part of the mixture from the pipe to force the piston up forclosing the port valve, a box extending from the frame and provided witha ch amber, a pipe for conveying the mixture from the reservoir into thechamber, a cylinder under the chamber, a shoe provided with an orificedpiston for the cylinder, a revoluble grooved rotor under the shoe, afixedly mounted vane in the groove, a slide provided with a vanereaching in the groove when the fixedly mounted vane is past theorificed piston, a sparking space in the chamber, ports connecting thechamber with the pipe and with the cylinder and means for closing thepipe port and for opening the cylinder port and for causing -a spark inthe sparking space for igniting the mixture and generating a highpressure for forcing theproducts of combustion from the chamber into thecylinder through the piston orifice and into the space of the groovebetween the fixedly mounted vane and the slide vane.

36. In an engine comprising a frame, pedestals supported thereby andprovided with journal boxes, a shaft journaled there- 'in, a gasgenerator, a reservoir for storing the gas, 'a reciprocating pump forforcing the gas fromvthe generator into the reservoir, a means fortransmitting the motion of the shaft to the pump, a pipe leading out ofthe reservoir, a cylinder, a piston slidingly mounted therein and a pipeconnecting the reservoir with the cylinder to convey gas from thereservoir into the cylinder to force the piston up for preventing thefiow of gas from the reservoir, a ring forcing the piston down to permitthe flow of gas from the reservoir, a box projecting from the frame, achamber within the box and a pipe connecting the reservoir pipe with thechamber, a cylinder under t e chamber, ports between the chamber and thecylinder and between the chamber and the pipe, valves and means formanipulating the valves for closing the cylinder port and .for openingthe pipe port to permlt the gas to accumulate in the chamber and toclose the pipe port and open the cylinder port to permit the accumulatedgas to flow rotor groove.

from the cylinder, a shoe provided with an orificed piston for thecylinder, a grooved rotor fixedly mounted on the shaft, a vane fixedlymounted in the groove, a slide provided with a vane and a means forholding chamber, an arcing space between the ter-v minals and a means tocause a spark for exploding the gas in the chamber to force it throughthe orifice for producing a pressure on the fixedly mounted vane tocause.

the shaft to rotate.

37. In a rotary gas engine, comprising a frame, pedestals supportedthereby and provided with journal boxes and a shaft journaled therein, arotor fixedly mounted thereon to revolve therewith and consisting of twodisks, a concentric cylinder of lesser diameter than those of the disksjoining them and forming the bottom of a groove flanged by the diskswhich are tapered to form an obtuse angled joint with the cylinder,ashoe provided with pistons slidingly mounted over the groove, vanesfixedly mounted on the rotor, a slide slidingly mounted in the shoe andprovided with a vane for fittingly projecting in the groove, a boxsupported from the frame and provided 'with cylinders for the pistons, agas chamber within the box, means for causing gas to accumulate in thechamber, means for forcing gas from the chamber into the cylinders andover the pistons for causing gas tight contact between the shoe and the38. In a rotary engine comprising a frame, pedestals supported therebyr,and

' provided 'with journal boxes, a shaft revolvingly mounted therein, agrooved ro' tor fixedly mounted thereon to revolve therewith, vanesfixedly mounted on the rotor, cams mounted on the rotor on the outsideof and below the groove, a shoe provided with a slide channel, slidinglymounted over the rotor, a slide provided with avane for projectingwithin the groove slidingly mounted in the channel tobe lifted out ofthe groove by the cams for allowing the fixedly mounted vane to pass theslide vane, and coiled springs connecting the slide with'the journalboxes for causing the slide vane to project in the groove when thefixedly mounted vane is past the slide vane.

39. In a rotary gas engine comprising'a frame, pedestals supportedthereby provided with journal boxes and a shaft journaled therein, arotor fixedly mounted on the shaft to revolve therewith, a groove aroundthe rotor, vanes fixedly mounted on the rotor, cams mounted on the rotoron the outside of the groove and below the vanes, a shoe pivoted withpistons slidingly mounted over thegroove and spanning the rotor, a boxprojecting from the frame and provided with cylinders for the shoepistons, a gas chamber in the box, terminals of an electric circuit inthe'chamber orifices through the shoe pistons, a slide channel throughthe shoe and a slide provided with a vane slidingly supported thereinfor permitting the vane to slide in and out of the rotor groove, a meansfor causing the slide vane to project in-the groove when a fixedlymounted vane is past an orifice of a shoe piston, a means for conveyingan explosive mixture into the box chamber, a means for closing theconveying means and for exploding the mixture for forcing it into thegroove to produce a pressure on the fixedly mounted vane when said vaneis past the shoe piston for causing the journaled shaft to rotate, anexhaust through the shoe for discharging the gas from the groove whenthe fixedly mounted vane is passing said exhaust.

40. In a gas engine comprising a frame, pedestals supported thereby andprovided with journal boxes, a shaft journaled therein, a grooved rotorfixedly mounted thereon, shoes provided with pistons mounted over therotor 'grooveand spanning the rotor, and a box projecting from the frameprovided with cylinders over the shoe pistons, a gas chamber within thebox and over the cylinder, orifices through the pistons, a means forgenerating an explosivemixture, a reservoir for storing the mixture, ameans for forcing the mixture from the generator into thereservoir, apipe for-conveying the mixture from the reservoir through a portcontrolled by a valve, a cylinder and a piston mounted therein, a rodconnecting the piston with the reservoir pipe port valve and a springfor causing the piston to open the valve for permitting the mixture ofthe reservoir to fiow in the pipe, an elbow pipe.

connecting the reservoir pipe with the cyl inder for permitting themixture to flow in the cylinder for causing the piston to close thevalve, pipes connecting the reservoir pipe with the box chambers, portsbetween the chambersand the pipes and between the chambersand thecylinders, valves and a means for closing the cylinder ports and openingthe pipe ports for allowing the mixture to accumulate in the chambers,ter

minals of an electric circuit within the chambers, an arcing spacebetween the ter minals for exploding the accumulated mixture, fixedlymounted vanes in the groove, a slide channel of the shoe in front of theshoe pistons and exhausts in the rear of the pistons, a vslide mountedin the slide channel provided with a vane, springs connecting the slidewith the journal boxes for forcing the slide vane into the groove toform a pressure chamber when one of the fixedly mounted vanes is past ashoe piston, a means for causing a spark in the arcing space forexploding the mixture to force it through the piston orifice and withinthe groove for producing a pressure on the said fixedly mounted vane tocause the shaft to revolve until said vane is past the exhaust and tobring another vane past the orifice of a piston, cams mounted on therotor for causing the slideto move out of the rotor groove forpermitting the fixedly mounted vane to pass to form another impactchamber for an exploded mixture for producing a pressure on said fixedlymounted vane.

41. In a rotary gas engine, a frame, pedestals supported therebyprovided with j0urnal boxes and a shaft journaled therein, a groovedrotor fixedly mounted on the shaft to revolve therewith, radial vanesfixedly mounted on the rotor, shoes provided with pistons spanning therotor and slidingly mounted over the groove, exhausts through the shoesand slide channels passing radially through the shoes and between theexhausts and the pistons, slides mounted in the channels provided withvanes for movingly fitting the rotor groove, cams mounted on the rotorfor lifting the slide vanes out of the groove to permit the fixedlymounted vanes to pass the slide vanes, springs connecting the slideswith the journal boxes for causing the slide vanes to move into thegroove, boxes projecting from the frame and provided with cylinders forthe shoe pistons, chambers within the boxes and over the cylinders,pipes leading to the chambers, ports between the chambers and the pipes,ports be tween the chambers and the cylinders, orifices through the shoepistons connecting the cylinders with' the rotor groove terminals of anelectric circuit within the chambers, an arcing space between theterminals, brackets attached to the boxes, levers provided with two armsand with a leg pivoted on the brackets, rods pivoted on the arms, valvesfor controlling the ports mounted on the rods, rods pivotally connectingthe shoe slides with the legs of the levers, terminals of an electriccircuit grounded on the frame and terminals near the levers for closinga circuit when the cylinder ports are closed and the pipe ports areopen, and for breaking the circuit when the pipe ports are closed andthe cylinder ports are open for explodin a gas in the chambers which isforced within the rotor groove to produce a pressure on the vanesfixedly mounted in the groove for causing the rotor to revolve with theshaft.

42. In a rotary engine comprising a frame, pedestals supported therebyand provided with ournal boxes, a shaft journaled therein, a groovedrotor fixedly mounted thereon provided with fixedly mounted vanes torevolve therewith by a pressure produced on said vanes, shoes spanningthe rotor provided with pistons, boxes provided with cylinders for saidpistons, chambers within the boxes, orifices through the shoe pistonsfor conducting a gas from the chambers into the groove of the rotor, incombination with orifices for conducting gas from the groove to thecylinders over the pistons for causing the shoes to make gas tightcontact with the span of the rotor.

43. In a rotary gas engine comprising a frame, pedestals supportedthereby and provided with journal boxes, a shaft journaled therein, arotor, a groove around the rotor and radial vanes mounted therein forreceiving a pressure for causing the rotation of the shaft, shoesmounted over the groove spanning the rotor, pistons to be forced by agas to cause gas tight contact between the shoes and the rotor span,channels, slides slidingly mounted therein and provided with vanes freeto slide in and out of the rotor groove, boxes projecting from the frameand provided with cylinders, for the shoe pistons, gas chambers over thecylinders, gas pipes leading to the chambers, ports and valves forcontrolling them, terminals of electric circuits and means for causingsparks between said terminals, brackets mounted on the boxes, leverspivoted thereon and pivotally connected with the chamber port valves andwith the slides and near a terminal of an electric circuit, cams mountedon the rotor for lifting the slide vanes out of the groove to allow thefixedly mounted vanes to pass them and to cause the slides to operatethe levers to close a cylinder port and to open a pipe port for allowinggas to accumulate in a chamber at the same time closing an electriccircuit, springs connecting the slides with the journal boxes forcausing the slide vanes to move down in the groove when a fixed vane ispast a shoe piston, for the purpose of forming impact chambers to causethe slide to operate the lever for causing the pipe ports to close andthecylinder ports to open and at the same time breaking an electriccircuit for causing a spark within the chamber, in combination with handoperated starting and stopping devices for lifting the slide vanes outto allow the accumulation of gas in the box chambers and closing anelectric circuit and to hold it in this position for preventingexplosions to make the engine inactive, and for releasing the slides toopen a circuit for exploding the accumulated gas to produce a pressureon the rotor vanes for starting the engine. 1

44. In a rotary gas engine comprising a the groove and the span of theshoe between the groove vane and the slide vane for causing an impactupon the groove vane for producing the rotation of the shaft.

45. In a rotary gas engine comprising a frame, pedestals supportedthereby and provided with journal boxes, a shaft journaled therein, agrooved rotor mounted thereon to revolve therewith, radial vanes fixedlymounted in the groove to be impelled by pressure to cause the shaft torotate, shoes mounted over the groove and provided with orificedpistons, radial slide channels and exhausts, slides provided with vanesslidingly mounted in the slide channels, boxes provided with gaschambers and with cylinders for the shoe pistons, means for conveyinggas into the cylinders and over the pistons for causing them to forcethe shoes against the spans of the rotor for producing a gas tightcontact between the shoes and the said spans, and expanding pressurechambers consisting of portions of the rotor groove, the slide vanes,the span of the shoe and the fixed vanes as they move past the pistonswhen the gas is exploded in the gas chambers and forced within thegroove causing a pressure on the fixedly mounted vanes and forcing themto move past the pistons and the exhausts.

46. In a rotary gas engine comprising a frame, pedestals supportedthereby and provided with journal boxes, a shaft j ournaled therein, agrooved rotor provided with radial vanesadapted to rotate with theshaft, shoes provided with orificed pistons, with exhausts and withradial slide channels between the exhausts and the pistons and over therotor groove and span, the rotor always having one vane between apair ofshoe pistons when another passes an exhaust, boxes provided withcylinders for the pis tons and with gas chambers over the cylinders,.means for accumulating an explosive

